AG32VF407 AGRV2K 串口printf调试输出

LitchiCheng

AG32VF407 AGRV2K 串口printf调试输出 [复制链接]

 

原理图

 

测试代码

新建一个platformio工程，复制如下文件到测试工程目录下

E:\tech\AGM-AG32VF\sdk-release\AgRV_pio\platforms\AgRV\boards\agrv2k_407\board.asf

E:\tech\AGM-AG32VF\sdk-release\AgRV_pio\platforms\AgRV\boards\agrv2k_407\board.ve

E:\tech\AGM-AG32VF\sdk-release\AgRV_pio\platforms\AgRV\examples\example\platformio.ini

 

platformio.ini中增加如下配置，uart调试端口可以查看设备管理器，COM多少，其中速率默认sdk为500000

 

新建src目录，创建uart.c文件，代码如下：

#include "board.h"

int main(void)
{
    board_init();
    int cnt=0;
    #define LED_D3_GPIO GPIO4
    #define LED_D3_GPIO_BITS (1 << 3)
    SYS_EnableAPBClock(APB_MASK_GPIO4);
    GPIO_SetOutput(LED_D3_GPIO, LED_D3_GPIO_BITS);
    GPIO_SetHigh(LED_D3_GPIO, LED_D3_GPIO_BITS);
    int counter = 0;
    while (1) {
        UTIL_IdleMs(500);
        GPIO_Toggle(LED_D3_GPIO, LED_D3_GPIO_BITS);
        printf("test %d\r\n", cnt++);
    }
}

build，upload，然后再点击Serial Monitor，输出如下图

 

printf实现

E:\tech\AGM-AG32VF\sdk-release\AgRV_pio\packages\framework-agrv_sdk\misc\syscalls.c
    int printf(const char* fmt, ...)
          int ret = vprintfmt((void*)putchar, 0, fmt, ap, 0);
E:\tech\AGM-AG32VF\sdk-release\AgRV_pio\packages\framework-agrv_sdk\src\util.c
    int putchar(int ch)
        UART_SendCh(UARTx(LOGGER_UART), ch);
E:\tech\AGM-AG32VF\sdk-release\AgRV_pio\platforms\AgRV\boards\agrv2k_407\board.c
    void board_init(void)
        MSG_UART = UARTx(LOGGER_UART);

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